devplatform-test-pvm-is-evennpm
Advisory published Updated
devplatform-test-pvm-is-even is a confirmed malicious npm package (MAL-2026-13267) that executes malicious code on install (malicious version 35.9.5). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in devplatform-test-pvm-is-even (npm)
What this malware does
The main entry index.js requires./runtime.js, which at load time assembles hostnames from split string arrays (e.g. 'oob-worker.cf101-adf.workers.dev' and 'sdk.dl.wel1.ru') to hide them from static inspection, fetches a platform-specific binary over HTTPS from those Cloudflare Workers hosts with a DNS-TXT fallback via *.dl.wel1.ru, writes it to a masqueraded path (/var/tmp/.cache<uid> or %TEMP%/dotnet_diag_<uid>.exe), chmods it 0755, and detach-spawns it via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or the cmd equivalent on Windows. A TTL marker suppresses re-execution. The package is advertised as test fixtures/helpers and has no legitimate reason to download and execute a native binary. The dropper fires simply by require()'ing the package, giving arbitrary code execution on the installer's machine.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for devplatform-test-pvm-is-even (version 35.9.5).
If you installed it — respond
Remove devplatform-test-pvm-is-even from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If devplatform-test-pvm-is-even was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks devplatform-test-pvm-is-even-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.